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Self-assembly in Mixtures of Charged Lobed Particles

Provisionally accepted
The final version of the article will be published here soon pending final quality checks
Arpita Srivastava1,  Brunno C. Rocha1 and  Harish Vashisth2*
  • 1University of New Hampshire, United States
  • 2Chemical Engineering, University of New Hampshire, United States

We report coarse-grained Langevin dynamics simulations of homogeneous mixtures of lobed colloidal particles with opposite charges. We show that dumbbell, trigonal planar, tetrahedral, square planar, trigonal bipyramidal, and octahedral shaped particles form distinct self-assemblies including chains, sheets, crystalline, and spherical structures. The dumbbell and square planar particles predominantly form chains and sheets while other particles form network-like self-assembled morphologies. At higher temperatures and lower charges, non-planar particles form three-dimensional aggregates. We further report on packing arrangements of particles which lead to differences in porosities within self-assembled morphologies. Our results show that the trigonal planar particles form larger porous structures. The self-assembled structures that we report are potentially useful in designing porous biomaterials for biomedical applications.

Keywords: self-assembly, charged lobed particles, Particle mixtures, Porous structures, long range interactions

Received: 05 May 2022; Accepted: 17 Jun 2022.

Copyright: © 2022 Srivastava, Rocha and Vashisth. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Prof. Harish Vashisth, University of New Hampshire, Chemical Engineering, Durham, 03824, NH, United States